Which one is not a branch of physical sciences ?
Correct answer: D. Biology
- A. Chemistry
- B. Astronomy
- C. Geology
- D. Biology
Explanation
Biology is a life science because it studies living organisms, whereas chemistry, astronomy and geology are traditionally grouped among the physical or Earth-related sciences. The likely mistake is choosing geology because it studies the Earth, although geology is generally included with the physical sciences in elementary classifications.
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Quantum theory treats electromagnetic radiation as packets of energy called photons, with energy proportional to frequency through E equals hf. The topic covers Planck's hypothesis, photon momentum, the photoelectric effect, threshold frequency, work function and wave particle duality, distinguishing quantised energy exchange from classical continuous radiation.
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